Carbine tool



Feb.

J. J. BARTOLAT CARI-BIKE? TOOL Filed Feb. 8, 1945 dusE h J-Earm1at Patented Feb. 1, 1949 UNITED STATES PATENT OFFICE 'CARBINE TOOL Joseph J. Bartolat, Fort "Lewis, Wash.

Application February 8, 1945, Serial No. 576,869

(Granted under the act of March 3, 1883, as

amended April 30, 1928; 370 0. G. 757) 1 Claim.

The invention described herein may be manuiactured and used by or for the Government for govermnental purposes without the payment to me of any royalty thereon.

This invention relates to a tool for removing the piston nut of a carbine and for retapping "the thread of the gas cylinder when necessary.

It is a primary aim of this invention to provide an improved tool to replace the gas piston nut removing tool M for the U. S. carbine which, in use, usually damages the piston nut and thread of the gas cylinder, which the nut engages, when removing the nut thus requiring replacement of the nut and retapping of the thread, due to the fact that the nut is staked in.

More particularly, it is an aim of the invention to provide a Wrench for removing the piston nut which is rotatably and slidably engaged by a guide which functions to effectively retain the wrench in engagement with the lugs of the nut to prevent damage of said lugs, caused by the wrench slipping out of engagement therewith, as is common with the M5 tool.

Another object of the invention is to provide a hand tap, which is carried in the same manner as the wrench by the guide, for retapping the gas cylinder thread, when required.

A further aim of the invention is to provide spring means for biasing the wrench or tap into engagement with the nut or gas cylinder, respectively, to thereby prevent accidental disen gagement of the tool and work while in use.

Still a further aim of the invention is to provide a tool, of which the guide forms a holder, capable of being readily detachably connected to a fixed part of the carbine barrel and receiver group by a removable part of the same group.

Other objects and advantages of the invention will hereinafter become more fully apparent from the following description of the drawing, which illustrates a preferred embodiment thereof, and wherein:

Figure 1 is a side elevational view, partly in section showing the tool mounted in a portion of the barrel and receiver group of a U. S- carbine;

Figure 2 is a front elevational view of the same taken substantially at right angle to Fig. 1;

Figure 3 is an enlarged elevational view of the wrench removed from the guide;

Figure 4 is a view similar to Fig. 3 of the hand tap;

Figure 5 is an end View in elevation looking toward the working engaging end of the wrench;

Figure 6 is a view similar to Fig. 5 looking toward the working engaging endof the hand tap; and

Figure '7 is an 'elevational view of the holder and guide unit.

Referring more particularly to the drawing, wherein like reference characters designate like or corresponding parts throughout the different views, 8 designates generally a portion of the barrel and receiver group of a U. S. carbine caliber 30, M1 or MlAl and which includes a gas cylinder 9 which is internally threaded at its outer end to receive an annular piston nut ill which forms a bushing for thestem ll of a piston [2 which is mounted in gas cylinder '9. A trigger housing retaining lug i3 is disposed in spaced relationship to the gas cylinder 9, and

located therebetween is the operating-slide guide way I' l. These parts are of conventional construction and form no part of the present invention but have been illustrated and described merely to illustrate the application of the tool, designated generally l5, comprising the invention.

Tool 15 includes generally the tool holder and guide it and the wrench ll and hand tap l8.

Tool holder or guide it includes a head 19 having a substantially flat inner side which'is adapted to be disposed against the underside of the receiver of the group 8 and which is provided wtih an opening 20 which extends crosswise therethrough. The head I9 is also provided with edgewise disposed aligned openings 2| which open into opening 20 and which are adapted to align with the opening 22 of the lug l3, when the head i9 is in its position of Fig. 1, to receive a retaining pin, preferably the operating slide spring guide 23 of the carbine, which is of the correct size to properly fit openings 2| and 22. The tool holder l6 also includes an integral guide 24 which projects from one end of head l9, which is offset relatively thereto and which is adapted to be disposed in the recess formed by the operating slide guideway I4. Guide 24 is provided with a hollow interior forming a cylinder 25 which opens toward the gas cylinder 9 and which is aligned therewith.

The wrench l! includes a hollow head 26 which is open at its outer end and which is notched at said end to form the equally spaced arcuate lugs 21, corresponding to lugs 28 of the piston nut 10, and which are adapted for inter-engagement therewith. The head 26 is provided with a transverse opening 29, adjacent its opposite end, and from said last mentioned end projects a stem 30 sized to slidably and rotatably engage cylinder 25. Stem 30, at its free end, is provided with a restricted neck 3| terminating in an enlarged head 32. An expansion coil spring 33 has one or two convolutions at one end thereof restricted to engage closely around the neck 3| to position the rim of the head 32 between two of its convolutions for securely attaching said end of spring 33 to the wrench ii. The outer convolutions of the opposite end of spring 33 is enlarged to a diameter substantially that of the interior of cylinder 25 to frictionally engage slightly therein when the stem 30 and spring 33 are disposed in the guide 24, as seen in Fig. 1.

A lever 34 is provided with a reduced end 35 sized to removably fit opening 29 for turning the wrench H relatively to the guide 24. Lever 34 is preferably attached to tool l5 by an eye 36, on the head l9, and a chain or other flexible connector 31. r

The hand tap I 8 is provided with a head 38 of the type which is conventional in taps, and is provided with a shank 39 of the same diameter as stem 30 having a transverse opening 49, for the same purpose as opening 29. Shank orstem 39 has a neck and head corresponding to neck and head 3| and 32, respectively, and the spring 33, correspondin to spring 33 of wrench [1.

Assuming the tool i5 to be assembled and applied, as shown in Fig. l, with the lugs 21 engaging lugs 28, the nut It} can be removed by turnin the wrench I! relatively to the guide 24 by means of the lever 34. During this operation the spring 33 will yieldably retain lugs 21 in engagement with lugs 28 to prevent the wrench head 26 from slipping ofi of lugs 28 and thereby either breaking said lugs or bending them so that they will not properly engage piston rod I Head 26 is formed hollow to accommodate the outer end of piston rod I I. The spring 33 will turn in the cylinder 25 with the stem 30 in either applying or removing nut I0, and the stem 30 will slide as well as rotate within cylinder 25, yieldably urged by spring 33 to remain in engagement with nut Hi during its entire travel while applying nut l to or removing it from gas cylinder 9. It will thus be apparent thatthe tool I will not damage lugs 28 or the threads of gas cylinder 9, in removing or replacing nut l0. After nut ID has been removed; should the thread of gas cylinder 9 bedamaged due to another tool having been previously used for removin nut I 0, the wrench I! can be removed from the holder l6 and replaced by the hand tap 58 which can then be operated in the same manner as the wrench I! for recutting said thread.

Various modifications and changes are contemplated and may be resorted to without departing from the spirit and scope of the invention as hereinafter defined by the appended claim, as only a preferred embodiment thereof has been disclosed.

I claim:

A tool device for a carbine comprising a support; means on said support constructed to detachably secure said support in predetermined fixed relation to, and. with its axis rigidly oriented and parallel to the axis of a carbine; a hollow guide sleeve integral with and extending from said support and open only at the end remote from said support, the axis of said sleeve being ofiset from and parallel with said support axis; a removable work-engaging element rotatably and slidably mounted in said guide sleeve and freely removable through said open end; resilient means in said guide sleeve biased to urge said workengaging element toward the work to be engaged, said work-engaging element having a transverse perforation; a lever constructed at one end to engage either end of said transverse perforation for rotating said work-engaging element; and chain means connecting the other end of said lever with said support. r I

- JOSEPH J. BARTOLAT.

. REFERENCES CITED The following references are of record in'the file of this patent:

. UNITED STATES PATENTS Number Moeller Nov. 10, 1942 

